By introducing parameters λ,μ and α,and using the way of weight coefficient,a new Hilbert s type multiple integral inequality is given,and the problem of the best constant factor in some particular conditions is discussed.

This paper discusses the determination method for the polymer volume combining with theoretical study and field application, and determines a reasonable polymer volume scope.

By explanation of two deferent determination methods and by analysis of and comparison between the calculation(measurement) results obtained by using there two methods, the author found out a better method to determine the strand diameter.

According to the project practice,this paper indicates the determination method of the support system during the construction on continuous box beams.